1OED

STRUCTURE OF ACETYLCHOLINE RECEPTOR PORE FROM ELECTRON IMAGES


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and Gating Mechanism of the Acetylcholine Receptor Pore.

Miyazawa, A.Fujiyoshi, Y.Unwin, N.

(2003) Nature 423: 949

  • DOI: 10.1038/nature01748
  • Also Cited By: 2BG9

  • PubMed Abstract: 
  • The nicotinic acetylcholine receptor controls electrical signalling between nerve and muscle cells by opening and closing a gated, membrane-spanning pore. Here we present an atomic model of the closed pore, obtained by electron microscopy of crystall ...

    The nicotinic acetylcholine receptor controls electrical signalling between nerve and muscle cells by opening and closing a gated, membrane-spanning pore. Here we present an atomic model of the closed pore, obtained by electron microscopy of crystalline postsynaptic membranes. The pore is shaped by an inner ring of 5 alpha-helices, which curve radially to create a tapering path for the ions, and an outer ring of 15 alpha-helices, which coil around each other and shield the inner ring from the lipids. The gate is a constricting hydrophobic girdle at the middle of the lipid bilayer, formed by weak interactions between neighbouring inner helices. When acetylcholine enters the ligand-binding domain, it triggers rotations of the protein chains on opposite sides of the entrance to the pore. These rotations are communicated through the inner helices, and open the pore by breaking the girdle apart.


    Related Citations: 
    • Activation of the Nicotinic Acetylcholine Receptor Involves a Switch in Conformation of the Alpha Subunits
      Unwin, N.,Miyazawa, A.,Li, J.,Fujiyoshi, Y.
      (2002) J.Mol.Biol. 319: 1165
    • Nicotinic Acetylcholine Receptor at 9A Resolution
      Unwin, N.
      (1993) J.Mol.Biol. 229: 1101
    • Nicotinic Acetylcholine Receptor at 4.6A Resolution Transverse Tunnels in the Channel Wall.
      Miyazawa, A.,Fujiyoshi, Y.,Stowell, M.,Unwin, N.
      (1999) J.Mol.Biol. 288: 765


    Organizational Affiliation

    RIKEN Harima Institute, 1-1-1 Kouto, Mikazuki-cho, Sayo, Hyogo 679-5148, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINE RECEPTOR PROTEIN, ALPHA CHAIN
A, D
227Torpedo marmorataGene Names: CHRNA1
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Nicotinic Acetylcholine Receptor Pore (closed state)
Find proteins for P02711 (Torpedo marmorata)
Go to Gene View: CHRNA1
Go to UniProtKB:  P02711
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINE RECEPTOR PROTEIN, BETA CHAIN
B
250Tetronarce californicaGene Names: CHRNB1
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Nicotinic Acetylcholine Receptor Pore (closed state)
Find proteins for P02712 (Tetronarce californica)
Go to Gene View: CHRNB1
Go to UniProtKB:  P02712
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINE RECEPTOR PROTEIN, DELTA CHAIN
C
260Tetronarce californicaGene Names: chrnd
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Nicotinic Acetylcholine Receptor Pore (closed state)
Find proteins for P02718 (Tetronarce californica)
Go to UniProtKB:  P02718
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINE RECEPTOR PROTEIN, GAMMA CHAIN
E
260Tetronarce californicaGene Names: CHRNG
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cys-Loop Receptor Family
Protein: 
Nicotinic Acetylcholine Receptor Pore (closed state)
Find proteins for P02714 (Tetronarce californica)
Go to Gene View: CHRNG
Go to UniProtKB:  P02714
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance